Acknowledge

1. v. t. To own as genuine; to assent to, as a legal instrument, to give it validity; to avow or admit in legal form; as, to acknowledgea deed.
2. v. t. To of or admit the knowledge of; to recognize as a fact or truth; to declare one’s belief in; as, to acknowledge the being of a God.
3. v. t. To own or recognize in a particular character or relationship; to admit the claims or authority of; to give recognition to.
4. v. t. To own with gratitude or as a benefit or an obligation; as, to acknowledge a favor, the receipt of a letter.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.